+2005-11-01 Borut Razem <borut.razem AT siol.net>
+
+ * sim/ucsim/app.cc, sim/ucsim/cmd.src/cmdutil.cc, sim/ucsim/cmd.src/newcmd.cc:
+ enabled sockets on WIN32
+
+2005-10-31 Borut Razem <borut.razem AT siol.net>
+
+ * support/regression/generate-cases.py: escape backslashes in {testcase}:
+ WIN32 backslash path delimiters should be escaped when used in C strings
+ * support/regression/tests/bitfields.c: exclude failing assertions for
+ __CYGWIN32__ and __MINGW32__ hosts
+
+2005-10-30 Borut Razem <borut.razem AT siol.net>
+
+ * src/SDCCutil.c: corrected double comparison typo
+
+2005-10-27 Maarten Brock <sourceforge.brock AT dse.nl>
+
+ * device/lib/medium/Makefile: added for new memory model medium
+ * device/include/asm/mcs51/features.h: updated for medium/pdata
+ * device/include/mcs51/c8051f120.h: added sfr16/sfr32 definitions,
+ added Multiply & Accumulate sbit's and MAC0_PAGE define
+ * device/include/mcs51/c8051f300.h: added sfr16 definitions
+ * device/include/mcs51/c8051f310.h: added sfr16 definitions
+ * device/lib/_mullong.c: update for medium model
+ * device/lib/incl.mk: added medium model
+ * doc/sdccman.lyx: documented medium model
+ * src/SDCCast.c (isBitAndPow2): simplified using updated powof2
+ * src/SDCCicode.c (geniCodeMultiply, geniCodeDivision): use updated powof2
+ * src/SDCCmain.c (optionsTable, linkEdit): enabled medium model
+ * src/SDCCmem.c (allocIntoSeg): set iaccess for pdata symbols,
+ (allocParms): set SCLS and OCLS to pdata for medium model
+ * src/SDCCsymt.c (processFuncArgs): use default_local_map and set iaccess
+ for pdata,
+ (powof2): return <0 if not power of 2
+ * src/avr/gen.c (genBitWise): use updated powof2
+ * src/mcs51/gen.c (genMinusDec): use acc if necessary,
+ (shiftR2Left2Result): small optimization in setup, save acc when storing,
+ (shiftLLeftOrResult): use B if necessary
+ * src/mcs51/main.c (_mcs51_finaliseOptions, mcs51_port): added medium model
+ * src/mcs51/peeph.def: renamed 226 to 226.b, added 226.a
+ * src/pic/main.c (_pic14_do_link): made void parameter list explicit
+ * support/regression/Makefile.in: added test-mcs51-medium
+ * support/regression/ports/mcs51-medium/spec.mk: added to test medium model
+
+2005-10-28 Bernhard Held <bernhard AT bernhardheld.de>
+
+ * src/SDCCsymt.c (compStructSize): make bitfields without (un)signed
+ specifier unsigned
+ * device/lib/time.c (mktime): fixed bug 1334315
+
+2005-10-28 Raphael Neider <rneider AT web.de>
+
+ * device/include/pic/p16f_common.inc: added common declarations
+ * src/pic/ralloc.c (initStack): moved regs *r to block start for Alpha
+
+2005-10-27 Maarten Brock <sourceforge.brock AT dse.nl>
+
+ * src/mcs51/gen.c (getTempRegs): return 0 if not enough registers found,
+ (aopPutUsesAcc): added to predict accumulator use,
+ (assignResultValue): save acc if necessary,
+ (genMinusDec): store result if indirectly addressed,
+ (genDivOneByte): save acc if necessary,
+ (movLeft2Result): bugfix if left already in acc,
+ (genAnd, genOr, genXor, shiftL2Left2Result, shiftR2Left2Result): pay more
+ attention to accumulator use (esp. pdata),
+ (genReceive): receive pdata correctly
+ * src/SDCCicode.c (isOperandInPagedSpace): added to detect pdata operands
+ * src/SDCCicode.h: added isOperandInPagedSpace prototype
+
+2005-10-27 Raphael Neider <rneider AT web.de>
+
+ * doc/sdccman.lyx: corrected version (should be 2.5.4 not 2.5.5)
+
+2005-10-27 Raphael Neider <rneider AT web.de>
+
+ * .version: changed version to 2.5.4
+ * doc/sdccman.lyx: changed version to 2.5.4, added some remarks to PIC14
+ * device/lib/pic/libsdcc/{_mulint.c,_mullong.c}: use unsigned literals,
+ (_divschar.c,divuchar.c,_mulchar.c,_modschar.c,_moduchar): NEW,
+ arithmetics support routines
+ * device/lib/pic/Makefile.rules: have assembler sources preprocessed
+ * device/lib/Makefile.in: also create installdir for pic
+
+ * src/SDCCopt.c (cnvToFcall): mark support routines `extern' for
+ pic14 port as well
+ * src/pic/device.c (dump_sfr): rewritten to delegate register
+ placement to the linker (use `extern sym' rather than sym EQU addr),
+ (validAddress): fixed to check last specified address
+ * src/pic/gen.c (aopForSym): added code to deal with array (useless?),
+ (popGetLit): truncate literal value to 8 bit,
+ (popGet): moved assert to more appropriate place
+ (popGetExternal): create pCode operand from and mark the according
+ symbol as being `extern'
+ (popGetAddr): added sanity check on immediate's offset, provide
+ GPOINTER tag on demand
+ (aopPut): fixed for immediates,
+ (mov2w_op): move operand's address or contents to WREG (depending on
+ operand type), safer variant of mov2w,
+ (movwf,call_libraryfunc): NEW, handy abbreviations,
+ (get_argument_pcop,get_return_val_pcop,pass_argument,
+ get_returnvalue): interface for accessing function parameters and
+ return values,
+ (assignResultValuei,genRet): use new parameter/return value interface
+ (pic14_getDataSize): back to old version handling generic pointers,
+ (pic14_toBoolean,genNot,genCpl,genCmpEq,genOrOp): heavily rewritten,
+ provided implementation and/or fixed old one,
+ (genMultOneByte,genDivOneByte,genModOneByte): implemented as library
+ calls, removed legacy 8051 reference code
+ (AccLsh,AccRsh): rewritten and fixed to deal with signed operands
+ (loadSignToC): NEW, move the operands sign bit to CARRY,
+ (genGenericShift): NEW, replaces genLeftShift, genRightShift and
+ genRightShiftSigned, accepts negative shift counts,
+ (setup_fsr): load FSR and adjust IRP (indirect memory access),
+ (emitPtrByteGet,emitPtrByteSet): rewritten, now works with
+ generic pointers, __data pointers and __code pointers,
+ (genUnpackBits,genPackBits): rewritten to work with generic pointers
+ and signed bitfields, limit bitfields to 8 bit,
+ (genDataPointerGet): fixed number of bytes read,
+ (genGenPointerGet,genConstPointerGet): fixed bitfield access,
+ (genPointerGet,genPointerSet): fixed handling of __code pointers,
+ pointers to constant data are no longer assumed to point to __code
+ space, removed invalid pointer types,
+ (bitpatternFromVal): retrieve the PICs representation of an integer
+ or float literal,
+ (genDataPointerSet): fixed assigning to po_immediate operands,
+ (genGenPointerSet): implemented as library call,
+ (genIfx): fixed incorrect condition,
+ (genAddrOf): limit generic pointers' addresses to 2 bytes,
+ provide GPOINTER tag according to destination's storage class,
+ (genCast): added code to handle casting to generic pointers, added
+ sign-/zero extension of the result
+ (aop_isLitLike,op_isLitLike): fixed handling of immediates
+ * src/pic/gen.h: added macros to access IRP bit in STATUS register
+ * src/pic/genarith.c (genAddLit): use min(result's,left's) size, sign
+ extend the result
+ * src/pic/glue.c (is_shared_address,is_shared): check whether a given
+ address/register resides in the shared banks
+ (emitSymbolToFile): improved to handle global and `pinned' symbols,
+ put all variables into separate sections (have the linker arrange
+ them)
+ (picglue): put init code and interrupt handlers in separate sections
+ * src/pic/main.c: added port specific options table, modified to PORT
+ structure to make GPOINTERs 3 byte, added pic14_options
+ (_pic14_do_link): private linking routine (update paths to libraries,
+ add libsdcc.lib by default)
+ * src/pic/main.h: declare pic14_options
+ * src/pic/pcode.c: fixed instructions i/o relations,
+ (RegCond): reverted to correct version,
+ (newpCodeOpLit): truncate literals to 8 bit,
+ (genericPrint): added debug output,
+ (getRegFromInstruction): fixed for various operand types, simplified
+ (BuildFlow): fixed broken handling of isntructions with labels
+ (LinkFlow): start at last instruction in flow (skip trailing comments),
+ pass the flow on to the next instruction after CALL
+ (pCodeReplace): NEW, replace a pCode and move meta data to the new one
+ (insertPCodeInstruction): fixed inserting after a skip instruction,
+ (DoBankSelect): fixed for labeled instructions
+ (OptimizepBlock): honor --nopeep switch
+ (AnalyzeFlow,ReuseReg): prevent crash on source files with no function
+ * src/pic/pcodepeep.c (pCodePeepMatchRule): prevent NULL pointer accesses
+ * src/pic/pcoderegs.c (regIsLocal): NEW, check visibility of a register
+ (pCodeOptime2pCodes): allow disabling this optimization via
+ --no-pcode-opt due seldomly occuring bugs, fixed some conditions
+ but is still buggy), started implementation of a dataflow based
+ pCode optimization (CSE + dead code elimination)
+ (pCodeRegMapLiveRangesInFlow): removed bogus inCond
+ * src/pic/ralloc.c (initStack): renamed stack registers to STK%d, the new
+ names are independant of the stack location and therefore portable across
+ devices
+
+2005-10-27 Maarten Brock <sourceforge.brock AT dse.nl>
+
+ * src/mcs51/ralloc.c (bitType): added to detect bit variables,
+ (selectSpil): fixed bug 1337835 by not spilling bit variables
+ * support/regression/tests/bug1337835.c: added test for this bug
+ * src/mcs51/peeph.def: restart after rule 3.c,
+ addded rules 263.x to optimize loading constants
+
+2005-10-26 Raphael Neider <rneider AT web.de>
+
+ * src/SDCCsymt.c (compStructSize): allow signed bitfields for PIC ports
+ * src/pic16/gen.c (genUnpackBits): support signed bitfields,
+ (genAssign): emit warning when casting literals to generic pointer
+ type, also applies when taking the address of a fixed variable,
+ (genCast): improved casting to generic pointers
+ * src/pic16/glue.c (pic16emitStaticSeg): fixed(?) handling of fixed
+ extern variables, added verbose error message
+ * device/include/pic16/{string.h,errno.h}: added #pragma library c
+
+2005-10-26 Bernhard Held <bernhard AT bernhardheld.de>
+
+ * src/mcs51/gen.c (genMinus): fixed bug 1270906: reverse subtraction,
+ carry must be complemented too
+ * src/mcs51/peeph.def: addded rule 262 to remove double cpl c, which
+ could be emitted by genMinus
+ * src/SDCCval.c (constVal): fixed bug 1305065
+
+2005-10-25 Bernhard Held <bernhard AT bernhardheld.de>
+
+ * src/SDCCast.c (addCast): added promotion for bit variables
+ (decorateType): emit W_COMPLEMENT before the problem vanishes behind
+ promotion casts + optimisation
+ (optimizeGetWord): fix warning 'i' might be used uninitialized
+ * src/mcs51/gen.c (genCpl): removed W_COMPLEMENT
+ * src/ds390/gen.c (genCpl): removed W_COMPLEMENT
+
+2005-10-24 Bernhard Held <bernhard AT bernhardheld.de>
+
+ * src/SDCCicode.c (ast2iCode): reverted to 1.224 because of regression:
+ all chars are promoted to int; promotion should be handled in SDCCast.c
+
+2005-10-15 Jesus Calvino-Fraga <jesusc AT ece.ubc.ca>
+
+ * device/lib/_strcmp.c: Fixed bug 1326457
+
+2005-10-11 Raphael Neider <rneider AT web.de>
+
+ * device/lib/pic16/libio/i2c.ignore: added 1320, fixes broken builds
+ * device/lib/pic16/libdev/pic18f1320.c: added 1320's device library
+
+2005-10-05 Maarten Brock <sourceforge.brock AT dse.nl>
+
+ * src/SDCC.y (AT): fixed bug with sfr32 addresses when built with GCC
+ * support/regression/tests/sfr16.c: added test for the sfr32 bug
+
+2005-10-04 Raphael Neider <rneider AT web.de>
+
+ * device/include/pic16/pic18fregs.h, src/pic16/devices.inc,
+ device/lib/pic16/pics.all: added pic18f1320
+ * src/pic16/pcode.c (mnem2key): fixed prototype's argument mismatch
+
+2005-09-30 Raphael Neider <rneider AT web.de>
+
+ * src/pic16/device.c (Pics16[]): moved device descriptions to devices.inc
+ * src/pic16/devices.inc: NEW, provides device descriptions
+ * src/pic16/gen.c (genInline): fixed handling of ';'-comments
+
+2005-09-26 Maarten Brock <sourceforge.brock AT dse.nl>
+
+ * src/SDCCicode.c (operandOperation): added GETABIT, GETBYTE, GETWORD and
+ GETHBIT
+
+2005-09-25 Maarten Brock <sourceforge.brock AT dse.nl>
+
+ * doc/sdccman.lyx: updated Highest Order Bit documentation,
+ documented Any Order Bit, Higher Order Byte and Higher Order Word
+ * src/SDCC.y: added tokens GETABIT, GETBYTE, GETWORD
+ * src/SDCCast.c (optimizeGetHbit): updated to also accept bool=expr&(1<<n),
+ (optimizeGetAbit): new, to get any bit, not only the high bit,
+ (optimizeGetByte): new, to get a byte from a (long) int: expr>>(8*n),
+ (optimizeGetWord): new, to get a word from a long int: expr>>(8*n),
+ (isConformingBody): also check GETABIT, GETBYTE, GETWORD,
+ (decorateType): '&': also try GETABIT, GETBYTE, GETWORD optimization,
+ RIGHT_OP: also try GETBYTE, GETWORD optimization,
+ GETABIT, GETBYTE, GETWORD: decorate them,
+ (isShiftRightLitVal, isBitAndPowOf2): new helper functions,
+ (ast_print): added GETABIT, GETBYTE, GETWORD
+ * src/SDCCcse.c (isSignedOp): added GETABIT, GETBYTE, GETWORD
+ * src/SDCCicode.c (codeTable): added GETABIT, GETBYTE, GETWORD,
+ (geniCodeBinary): new generic binary icode,
+ (ast2iCode): added GETABIT, GETBYTE, GETWORD
+ * src/port.h: updated comment for PORT.hasExtBitOp
+ * src/mcs51/gen.c (genGetAbit): new, to get any single bit,
+ (genGetByte): new, to get a single byte,
+ (genGetWord): new, to get a word from a long,
+ (gen51Code): added GETABIT, GETBYTE, GETWORD
+ * src/mcs51/main.c (hasExtBitOp): added GETABIT, GETBYTE, GETWORD
+
+2005-09-23 Raphael Neider <rneider AT web.de>
+
+ * configure.in, configure: have device/lib/pic configured
+ * device/lib/Makefile.in: added model-pic14
+ * device/lib/clean.mk: added pic/ to clean rule
+ * device/lib/pic: added rudimentary pic14 library providing support
+ functions for multiplication/division/generic pointer access
+ * src/SDCCopt.c (convilong): mark support functions as extern
+ for pic14 port as well
+ * src/pic/gen.c (genMult): added assertions,
+ (genpic14Code): emit warning on unhandled iCodes
+ * src/pic/main.c (_hasNativeMulFor): return true only for 8x8 bit
+ * src/pic/pcode.c (pCodeOpCopy),
+ * src/pic16/pcodepeep.c (pic16_pCodeOpCopy): fixed handling of various
+ pCodeOpReg-subtypes (PO_{STATUS,INTCON,PCL,PCLATH,PCLATU,BSR,
+ SFR_REGISTER}), made safe for future extensions
+ * src/pic16/pcode.c (pic16_safepCodeUnlink): allow for removal of
+ instructions even if preceeded by SKIP instructions (also remove
+ them); removed unused code
+ * src/pic16/pcode.h: added arg2 to pCodeOpLit to match pCodeOpLit2,
+ prevents leaving parts of the structure uninitialized after copying
+
+2005-09-22 Maarten Brock <sourceforge.brock AT dse.nl>
+
+ * src/mcs51/gen.c (genMinus): fix for undetected bug introduced 3 months
+ ago by me
+ * support/regression/tests/addsub.c: added test for the bug
+
+2005-09-21 Raphael Neider <rneider AT web.de>
+
+ * device/include/pic16/pic18f1220.h,
+ device/lib/pic16/libdev/pic18f1220.c: added ECCPAS sfr and bitfield
+ * device/lib/pic16/Makefile.rules: added missing opening paren
+ * src/pic16/gen.c (pic16_genNot,pic16_genCpl): removed as these
+ are provided in genutils.c,
+ (genUminusFloat,genUminus,genCmpEq): added asserts on different
+ operand/result sizes,
+ (genCmp): assert on NULL pointers first, then check deref'ed values
+ * src/pic16/genutils.c (pic16_genCpl): fixed for different operand/
+ result size
+
+2005-09-18 Raphael Neider <rneider AT web.de>
+
+ * src/pic16/gen.c (genFarPointerGet,genFarPointerSet): removed
+ as these are now unused,
+ (genPointerGet,genPointerSet): handle FPOINTERs like POINTERs
+ * src/pic16/pcode.c (pic16_symIsSpecial): assume REG_TMPs to be
+ local, avoids uninitialized pointer dereference on r->name
+ * src/pic16/ralloc.c (newReg): fixed indentation
+
+2005-09-13 Maarten Brock <sourceforge.brock AT dse.nl>
+
+ * src/SDCCval.c (constVal): fixed bug 730366
+ * support/Util/SDCCerr.c,
+ * support/Util/SDCCerr.h: added warning W_INVALID_INT_CONST
+
+2005-09-10 Maarten Brock <sourceforge.brock AT dse.nl>
+
+ * as/mcs51/lkmem.c (summary2): fixed report for absolute areas (bug 1210220)
+
+2005-09-09 Maarten Brock <sourceforge.brock AT dse.nl>
+
+ * src/mcs51/peeph.def (241.x): fixed bug when comparing generic pointers
+
+2005-09-08 Maarten Brock <sourceforge.brock AT dse.nl>
+
+ * as/hc08/lkaomf51.c (OutputName): made name unsigned char,
+ (hex2dec): made hex_digit unsigned char, removed ascii dependance
+ * as/mcs51/lkaomf51.c (OutputName): made name unsigned char,
+ (hex2dec): made hex_digit unsigned char, removed ascii dependance
+ * as/mcs51/lkarea.c (lnkarea2): sort absolute areas to the front
+ * packihx/packihx.c (hexDigit): made c unsigned char
+ * as/mcs51/lklibr.c (fndsym),
+ * link/z80/lkgb.c (gb),
+ * link/z80/lklibr.c (fndsym),
+ * link/z80/lkrloc.c (relr),
+ * sim/ucsim/libltdl/ltdl.c (load_deplibs, try_dlopen),
+ * src/SDCC.lex (checkCurrFile, process_pragma),
+ * src/SDCCglue.c (spacesToUnderscores),
+ * src/SDCCmain.c (setParseWithComma, processFile),
+ * src/asm.c (tvsprintf, printCLine),
+ * src/avr/gen.c (emitcode, aopPut),
+ * src/ds390/gen.c (emitcode),
+ * src/hc08/gen.c (emitcode, emitinline),
+ * src/mcs51/gen.c (emitcode, genInline),
+ * src/pic/pcodepeep.c (cvt_extract_destination, cvt_extract_status,
+ tokenizeLineNode),
+ * src/pic/ralloc.c (debugLog),
+ * src/pic16/pcodepeep.c (cvt_extract_destination, cvt_extract_status,
+ tokenizeLineNode),
+ * src/pic16/ralloc.c (debugLog),
+ * src/z80/main.c (_process_pragma):
+ made all ctype.h function calls safe
+ * src/SDCCopt.c: include math.h for fabs
+ * src/SDCCpeeph.c: added macros ISCHARDIGIT, ISCHARSPACE and ISCHARALNUM
+ and used them throughout the code to make ctype.h function calls safe
+ * src/ds390/main.c (asmLineNodeFromLineNode),
+ * src/mcs51/main.c (asmLineNodeFromLineNode): made p unsigned char*
+ * src/pic/gen.c (DEBUGpic14_emitcode, pic14_emitcode): made lbp
+ unsigned char*
+ * src/pic/pcode.c (mnem2key): made mnem unsigned char*,
+ (newpCodeAsmDir): made ctype.h function calls safe
+ * src/pic16/gen.c (pic16_emitpcomment, DEBUGpic16_emitcode,
+ pic16_emitcode): made lbp unsigned char*
+ * src/pic16/pcode.c (mnem2key): made mnem unsigned char*,
+ (pic16_newpCodeAsmDir): made ctype.h function calls safe
+ * src/xa51/gen.c (emitcode),
+ * src/z80/gen.c (_emit2): made lbp unsigned char*
+ * support/Util/MySystem.c (split_command): made cmd_line and p unsigned
+ char*
+
+2005-09-05 Raphael Neider <rneider AT web.de>
+
+ * src/pic16/ralloc.c (pic16_allocDirReg): use device specific
+ access bank splitpoint
+
+2005-09-05 Raphael Neider <rneider AT web.de>
+
+ * device/lib/pic16/libc/Makefile: added (missing) string to SUBDIRS
+
+2005-09-03 Maarten Brock <sourceforge.brock AT dse.nl>
+
+ * .version: changed to version 2.5.3
+ * doc/sdccman.lyx: changed version to 2.5.3,
+ documented --codeseg and --constseg and pragma codeseg and constseg,
+ documented bit parameters (reentrant) and bit returning
+ * src/SDCCicode.c (geniCodeReceive): fixed (possible) bug generating
+ currFunc->recvSize, but is this ok for all ports?
+ (ast2iCode): result of ~ on unsigned char must be cast to int for
+ bool to work
+ * src/SDCCmem.c (allocGlobal, allocLocal): don't put bit returning
+ function pointers in bit space
+ * src/SDCCsymt.c (checkSClass): allow bit returning function pointers,
+ (processFuncArgs): call port.reg_parm() with reentrancy info
+ * src/port.h,
+ * src/avr/main.c,
+ * src/ds390/main.c,
+ * src/hc08/main.c,
+ * src/pic/main.c,
+ * src/pic16/main.c,
+ * src/xa51/main.c,
+ * src/z80/main.c: port.reg_parm prototype extended with
+ "bool reentrant" parameter
+ * src/mcs51/main.c (_mcs51_regparm): use parameter reentrant instead of
+ options.stackAuto for allocating bit register parameters
+ * src/mcs51/gen.c (genNot): optimized complementing direct bit,
+ (genSend): set BitBankUsed if it is,
+ (selectRegBank): factored out of genCall for use in genPcall,
+ (genCall): removed redundant dtype assignmen, use selectRegBank,
+ (genPcall): handle returning in Carry properly, save in F0 if needed,
+ (genReceive): handle bit register parameters
+ * src/mcs51/ralloc.c (updateRegUsage): update BitBankUsed along the way,
+ (mcs51_assignRegisters): enable bit registers for all reentrant
+ functions and don't set BitBankUsed unconditionally
+ * src/mcs51/peeph.def (177.d): fixed bug if %2==%3
+ * support/regression/tests/bitvars.c: enable tests for SDCC_STACK_AUTO
+ * support/regression/tests/funptrs.c: added tests for BOOL and for return
+
+2005-08-27 Borut Razem <borut.razem AT siol.net>
+
+ * device/lib/Makefile.in: cp on sparc-solaris (SunOS) and on
+ ppc-osx (Darwin) does not support -u option. It seems that it is
+ supported only on Linux - GNU cp
+
+2005-08-25 Borut Razem <borut.razem AT siol.net>
+
+ * sim/ucsim/gui.src/serio.src/Makefile.in,
+ sim/ucsim/s51.src/Makefile.in, sim/ucsim/avr.src/Makefile.in,
+ sim/ucsim/z80.src/Makefile.in, sim/ucsim/hc08.src/Makefile.in,
+ sim/ucsim/xa.src/Makefile.in: install -s changed to 2 steps:
+ install and strip, since the strip at /usr/ccs/bin should be used
+ on solaris
+
+2005-08-24 Borut Razem <borut.razem AT siol.net>
+
+ * clean.mk, device/lib/clean.mk: find on sparc-solaris does not support -maxdepth option
+
+2005-08-23 Bernhard Held <bernhard AT bernhardheld.de>
+
+ * src/SDCCopt.c (convertToFcall): fixed modulus with divisors 1 and
+ ffffffffu
+